生物法处理甲基硫化物恶臭气体的研究

Study on Biological Treatment of Malodorous Gas Containing Methyl Sulfide

采用活性污泥法富集培养去除甲硫醇、甲硫醚、二甲基二硫等甲基硫化物的优势菌种.结果表明,经过驯化后的活性污泥,对废水中的甲硫醇钠及COD去除率达90%,SV为18%.分析了在活性污泥驯化过程中原生动物的数量和种群的演替过程.将经驯化的活性污泥固定化后处理甲硫醚和二甲基二硫恶臭废气,在进气质量浓度分别为2～50,1～40mg/m3的范围内,甲硫醚和二甲基二硫去除率都能稳定在90%左右.

The dominant bacteria, which can remove methyl sulfide such as methanethiol （ME）, dimethyl sulfide （DMS） and dimethyl disulfide（DMDS） ,were enriched and cultured by activated sludge process. The experiment results indicate that, using the acclimatized activated sludge, the removal rate of sodium methyl mercaptide and COD in wastewater is 90% respectively, and SV of the sludge is 18%. The amount and succession of protozoans during the acclimation were also analyzed. The acclimatized activated sludge was immobilizaed and applied in the treatment of malodorous gas containing DMS and DMDS. When the mass concentration of DMS is 2-50 mg/m^3 and that of DMDS is 1-40 mg/m^3 , the removal rates of them are about 90%.